The British heteropteran fauna is classified into 36 families. The limits of the families have seen a number of recent changes.
 Heteroptera key to families occurring in Britain.pdf
Heteroptera key to families occurring in Britain.pdf Family Anthocoridae keys to British species.pdf
Family Anthocoridae keys to British species.pdfA small group of bugs with nine British species and a tenth on the Channel Isles.
 Family Cydnidae, key to British species.pdf
Family Cydnidae, key to British species.pdf Family Lygaeidae key to subfamily and species except Rhyparochrominae.pdf
Family Lygaeidae key to subfamily and species except Rhyparochrominae.pdf Family Lygaeidae, subfamily Rhyparochrominae key to genus.pdf
Family Lygaeidae, subfamily Rhyparochrominae key to genus.pdf Megalonotus dilatatus an exemplar of Lygaeidae.pdf
Megalonotus dilatatus an exemplar of Lygaeidae.pdfThe species of this family are rarely found.
 Family Microphysidae, key to British species.pdf
Family Microphysidae, key to British species.pdfThe key to genus now includes keys to species for some genera
 Family Miridae key to subfamily, tribe and genus.pdf
Family Miridae key to subfamily, tribe and genus.pdf Family Nabidae, key to the British species.pdf
Family Nabidae, key to the British species.pdf Family Rhopalidae, key to the British species.pdf
Family Rhopalidae, key to the British species.pdf Family Tingidae, key to British species.pdf
Family Tingidae, key to British species.pdf Family Veliidae key to British species.pdf
Family Veliidae key to British species.pdf